Improvement in rotary steam engines



G. KAISER. ROTARY STEAM ENGINE.

No. 66,092. Patented June 25,1867.

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IMPROVEMENT IN ROTARY STEAM ENGINES.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, CHARLES KAISER, of-No.,543 Pearl street, of the city, county, and State of'New York, have invented a new andnseihl Improved Rotary Engine; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being bad to the accompanying drawing, forming part of this specification, in which drawing- Figure 1 represents a vertical section of this invention taken in the plane indicated by the line a: z, fig. 2.

Figure 2 is a horizontal section of the some, the line y y, fig. 1, indicating the plans of section.

Figure 3 is a vertical section thereof, the plane of section being indicated by the line z z, fig. 1.

Figure 4 is a detached elevation of the.cut-ofi'.

Similar letters indicate corresponding parts.

This invention relates to a rotary engine in which a segmental piston .is'used,'which acts in conjunction with a slide-valve extending diagonally through the, centro of the cylinder. Said piston connects with the piston-wheel by means of a stud in such a manner that it is allowed to rock and that the steam itself is enabled.

to press the some up tight against the inner circumference of the cylinder. The ends of the piston are bevelled oil, so that the same, on coming in contact with the slide-valve, will throw the same from one side of the cylinder to the'other, whereby the steam is changed. The steam is admitted through the slide-valve and it exhausts through the sides of the cylinder into a steam jacket in such a manner that the cylinder is prevented from cooling oil by the influence of the external atmosphere, and at the same .time a free and unobstructed exhaust is provided. On the shaft of the pistoww'heel is mounted a segmental disk, which acts as a cut-0E, and by changing'the position or shape of this disk the steam can be out 0d at any desired point of the stroke.

A represents the cylinder of my rotary engine, which is bored out to receive the piston B. This piston is made in the form of a segment of an annular cylinder, had it moves in an annular space formed between the inner circumference of. the cylinder and the outer periphery of two segmental guide-pieces a, which rise from one of the heads E of the cylinder, being cast solid with the same or otherwise firmly attached to it. Between these guide-pieces is fitted the slide-valve O, which extends diametrically across the cylinder, being provided with an oblong hole or slot, through which the shaft 1) passes in such manner that said slide-valve is free to move transversely across the cylinder until one or the other of its points touches the inner circumference of the same. The places where the points strike are furnished with suitable packing-pieces b, and the points of the slide-valve may also be packed, so that they will fit steam-tight against the cylinder and against the inner circumferenceof the piston. Said piston connects by a stud, c, with the piston-wheel F, which is mounted on the shaft D and. which works steam-tight in the end of the cylinder 'and against the edges of the slide-valve, the guide-pieces a, and tlie piston B in such-a manner that when said piston-wheel is carried round by the action of the steam on the piston the steam is prevented from leaking through under the inner surface of said piston-wheel. The ends of the piston are bevelled oil to sharp edges, so that the same, in striking the slide-valve, cause the same to move from one side of the cylinder to the other, and the stud c, which forms the connection'between the piston and piston-wheel, rises about from the middle of the piston, allowing the same to rock, so that the steam is enabled to press up that end of the piston, on which it acts tight against the inner circumference or sides of the cylinder, thus relieving the largest portion from being in contact with the surface of the cylinder. The steam is admitted from the boiler or generator into a chamber or steam-chest G situated in the head E, and from this chamber through ports :1 d in the head, and through channels e c in the slide-valve into the interior of the cylinder. The-channels e e pass obliquely through the slide-valve, and those ends of the same, which face the ports 01 d are so situated that when the'slide-valve is moved toward one side the channel a admits steam and the port 01 is closed, and when the slide-valve is moved toward the opposite side the channel 0" admits steam and the port 11 is closed. The steam admitted through. the channel 0 acts on the end of the piston B andcauses the same to revolve in the direction of the arrow marked on it in fig. 1 and the steam before the piston exhausts through the portsf. As soon as the advancing end 'of the piston strikes the slide-valve said valve is thrown to the opposite side of the cylinder and the steam is changed. It is then admitted through the channel a and it exhausts through the portf. The exhauststeam passes into ajacket, J, .which surrounds the cylinder, and from which the steam escapes through the pipe g. By these means the cylinder is'kept warm and the condensation of the steam in its interior is prevented. In the interior of the steam-chest G is-tho cut 011' K, Which is composed of a. segmental disk mounted on the shaft D, and mcdeof such a shape that it closes the ports (1 d at the desired point of the stroke. It will be readily understood by referring to fig. 4 that by changing the shape of this disk the steam can be cut oil sooner or, later as maybe desired. If desired, my engine, can also-beusedivith advantage as a pump, and in that case the jacket J can be dispensed with.

What I claim as new, and desire to secure by Letters Patent, is- 1. The segmental piston B moving in the cylinder A, in combination with the transversely sliding valve 0; constructed and operating substantially. its and for the purpose described.

2. Connecting the piston B to thc piston-ivheel F in such a manner that it is fleeto rock, substantially as and for the purpose set forth. V I

3. Theslide-vnlve C andsegnlental piston 13, in combination withthejacket J on the cylinder, constructed and operating substantially [is and for the purpose set forth.

4. The cut-off K, in combination with the slide-valve C, segmental revolving piston B, and cylinder A, constructed and operating substantially as and for the purpose described. 7 I v y i CHARLES KAISER. Witnesses: i

- W. HAUFF,

l D. B. Camus. 

